Updates copyright year
Streamlined basic value types
Added _table_set to select_column_list.h
Added a bunch of table tests to select

And some hints regarding additional tests and how to turn them of for
subselects
Moved where-methods to where-classes.
Moved limit-methods to limit classes
Move offset methods into offset classes
Moved order_by-methods to order_by classes
Moved having-methods to having-classes
Moved group_by-methods to group_by classes
Moved flag-methods to select_flag classes
Moved from-methods to from-classes
Moved select_colum_list methods to the respective classes
Cleaned up a bit...
Added several call dispatches to reduce compiler spew in case of errors
Migrated remove to use inherited methods
Some cleanup
Migrated update to inheritance model
Migrated insert to inheritance model
Merge branch 'feature/inherit_statement_methods' into develop